#include<iostream>
using namespace std;
int main()
{
	class Date
	{
	public:
		void print(int year = 1, int month = 1, int day = 1)
		{
			cout << year << "-" << month << "-" << day << endl;
		}
	};

	Date d1;
	d1.print();
	
	return 0;
}